Measuring and registering pump.



No. 845,532 R PATENTED FEB. 26, 1907. w. M. DAVISON.

MEASURING AND REGISTERING PUMP.

. urmonmn FILED MAR. 22, 1906.

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- W. M. DAVISON.

MEASURING AND' REGISTERING PUMP.

APPLICATION FILED HA3- 22. 1908.

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LT a. b. B C C C ///////(//Y 2 UNITE STATES PATENT OFFICE.

MEASURING AND REGISTERING PUMP.

Specification of Letters Patent.

Patented Feb. 26, 1907.

Application filed March 22,1906. Serial No. 307,396.

To all whom it may concern:

Be it known that I, WILLIAM MILLER DAVI- SON, engineer, a subject of theKing of Great Britain and Ireland, residing at Government Road, PortPirie W est Extension, Port Pirie, State of South Australia,Commonwealth of Australia, have invented a certain new and usefulMeasuring and Registering Pump, of which the following is aspecification.

This invention comprises a device whereby publicans and others areenabled to accurately measure out desired quantities of liquidssuch, forinstance, as pints, half-pints, and butchersand at the same time arecord is kept of the number of such measures sold. It is especiallyuseful as a check upon bar attendants, the register being so constructedand operated that it cannot be tampered with by the attendant.

My invention relates to what are commonly known as beer-pumps orbeerengines, andconsists, essentially, of a special construction of pumpand two-part pistonrod therefor, and of a registering mechanism mountedupon or contained in such rod,with means whereby the registeringmechanism is operated each time the pump is operated.

My improved pump is attached beneath the counter in place of the pumpnow used, and the same arrangement of handles and pipes as are now usedmay be retained. It may be constructed of suitable size to measure andregister pints, butchers, or glasses of any size that may be desired.

In order that my invention may be clearly understood, I will describethe same with reference to the accompanying drawings, in which Figures1" and 1 is a front view partly in section. Figs. 2 and 3 are sectionalviews showing the registering mechanism, Fig. 2 being taken on aline a,b on Fig. 3 immediately behind the cover containing same, and Fig. 3.being a central cross-section. Figs. 4 and 5 are front and sectionalviews, respectively, of

ortion of the registering mechanism, showing in dotted lines one of theten-toothed spur-wheels and the finger for engaging same and showingalso the ratchet-wheel; and Fig. 6 is a detail view of theregistering-disks and their operating means looking in the direction ofthe arrow, Fig. 3. These figures are drawn to a larger scale than theothers.

A is the pump-barrel, which is secured beneath the counter by screws orother convenient fastening. It has inlet and outlet pipes A and A at thebottom, with suitable valves, and an overflow-pipe A with valve at oneside, the latter being for the purpose of insuring full measure, but notmore, of liquid being supplied each time. The inlet-pipe A is connectedto the cask or other vessel, as is also the overflow-pipe A Theoutlet-pipe A is carried up to the back of the bar, as usual. The pistonB has a double bucket leather or packing which causes it to be tight inboth .up and down movements. Two air-holes are provided in the cover ofthe pump-barrel. The piston-rod is made in two parts-a comparativelyshort inner portion 15, secured to the piston, and a comparatively longouter tubular portion B slidably attached to the short portion. Thetubular portion carries the registering mechanism and is attached to theusual pull or handle. (Not shown.) The outer tubular portion is attachedto the inner by means of a key or cotter B which fits rigidly to theouter portion, but passes through a slot in the inner portion. The outerportion is of such length that when the key is at the bottom of the slotin the shorter portion then the bottom end of the outer portion bearsupon the shoulder of the inner portion. The object of this is hereafterdescribed.

The registering mechanism is contained within a cap or chamber securedupon the piston-rod. It consists of a series of numbered disks 0 andtrain of spur-wheels and operating-fingers secured upon sleeves orhollow spindles carried upon pivot-pins C. The registering mechanism isinclosed within a cap B, the register-numbers being exposed throughopenings in the same. The registernumbers are not displayed except inFig. 1 The sleeve of the units-Wheel has upon. its other end aratchet-wheel C engaged by two spring-pawls C and C The one pawl C isthe operative pawl, the other, 0*, is a check-pawl. The ratchet-wheeland pawls are contained within a small chamber B immediately over theupper end of the tubular portion of the piston-rod. Into the top of theshorter portion B of the piston rod is screwed (with suitable lock-nut)a light-rod B, the upper end of which passes through the top of thetubular portion into the chamber 13 and impinges against the spring-pawlC The sleeve of the units-disk carries a finger which as it rotatesengages a ten-toothed spur-wheel upon the sleeve of the tens-disk. Thesleeve of the tens-disk carries a finger which as it rotates engages aten-toothed spur-wheel upon the sleeve of the hundredsdisk, and thesleeve of the hundreds-disk carries a finger which as it rotates engagesa ten-toothed spur-wheel upon the sleeve of the thousands-disk. Each ofthe spur-wheels is engaged and held by a check-spring 0, except whenbeing operated by its respective finger.

The operation of my invention is as follows: The pump is fixed andconnected in the usual way. Upon the movement of the pull or handle thepiston is raised within the barrel, drawing in a supply of liquidthrough the inlet-pipe. Upon the pull or handle being moved in theopposite direction the piston B is not operated until the tubularportion B of the piston-rod has traveled downward onto the shoulder ofthe inner portion B and the cotter B down to the bottom of the slot.This movement of the tubular outer portion relatively to the innerportion of the rod causes the light rod B to pass up into the chamber Band flatten the spring-pawl C and so operate the ratchet-wheel C andwith it the units-wheel C of the register. As the movement of the pullor handle is continued the piston is pushed down in the barrel, thesurplus liquor being first discharged through the overfiowpipe into thecask, and the required quantity of liquid is then forced up through theoutlet-pipe into the glass or other receptacle. Upon the movement of thepull or handle being reversed to draw the piston up again the tubularportion B of the piston-rod is first drawn up relatively to the innerportion B and over the light rod B until the cotter B meets the top ofthe slot, and this allows the spring-pawl C to return to its curvedposition, passing over the top of the adjacent tooth of the ratchetwheelC and falling into engagement with the next. As the pump is againdepressed the straightening of the spring-pawl O operates theratchet-wheel C and with it the disk G, altering the register-numberagain. Upon the tenth movement of the units-wheel its attached fingerengages the adjacent tooth on the spur-wheel of the tens-disk and thisis moved on. Similarly, the hundreds-disk and the thousands-disk areoperated by the tenth movement of the fingers of the tens-disk and thehundreds-disk, respectively. There is no need to reset the register,since after registering 9999 it begins again at O, and so onindefinitely.

Having now fully described and ascer tained my said invention and themanner in which it is to be performed, I declare that what I claimis- 1. In a pump for vending measured quantities of liquid a piston-rodin two parts capable of movement one against the other, such movementoperating a registering mechanism mounted upon the piston-rodsubstantially as described.

2. In a pump for vending measured quantities of liquid a piston-rod intwo parts capable of movement one against the other such partscomprising a short inner portion and an outer tubular portion, the shortinner portion being secured to the piston and the longer tubular portionbeing slidably attached to the short portion by a key or cotter fittingrigidly to the one part but passing through a slot in the other and thesaid inner portion carrying a rod passing up through the top of thetubular portion and operating the registering mechanism substantially asdescribed.

8. In a pump comprising means for both measuring and registering, apiston-rod in two parts a registering mechanism mounted upon a suitableportion of the piston-rod and comprising a series of numbered disks witha train of spur-wheels and operating-fingers, the units-wheel of theseries being moved by a pawl which on each downward movement of the pumpis operated by means of a rod carried by the other part of thepiston-rod sub stantially as described.

4. An improved pump for vending measured quantities of liquid and forregistering the number of such measures sold comprising a pump-barrelwith inlet and outlet pipes at the bottom and overflow-pipe at one sideand containing a piston with a bucket tight in both up and downmovements, the pistonrod being made in two parts, a comparatively shortinside portion secured to the piston and a comparatively long outsidetubular portion slidably attached to the short portion, the tubularportion carrying a registering mechanism which is operated by a rodprojecting from the top of the short portion and through the top of thetubular portion substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname, in the presence of two subscribing witnesses, this 6th day ofFebruary, 1906.

WILLIAM MILLER DAVISON.

WVitnesses:

ARTHUR GORE CoLLrsoN, GLADYs CLARE WILLIAMS.

